whenever i render my model, my GPU instantly goes to maximum usage
Maybe you are using a small amount of samples (like 128) and there is not to much lighting. In that case, if you have the denoiser is going to look weird. Also, maybe you are using both the GPU and CPU, I have bad results when I do that (I asume that there is a way of doing it properly). Try to increase the number of samples, change between CPU and GPU and see if something change...
And some pictures of your problem can help!
Good luck